inet6num: 2a00,1e10,,/32 netname: RU-POSTLTD-20100326 country: RU org: ORG-Ol3-RIPE admin-c: POST1-RIPE tech-c: POST1-RIPE status: ALLOCATED-BY-RIR notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: POSTLTD-MNT mnt-lower: POSTLTD-MNT mnt-routes: POSTLTD-MNT mnt-domains: POSTLTD-MNT created: 2010-03-26T13,12,13Z last-modified: 2016-05-19T15,34,33Z source: RIPE organisation: ORG-Ol3-RIPE org-name: OOO "Post ltd" org-type: LIR address: 118A, Pyatigorskaya str. address: 367600 address: Essentuky, Stavropol region address: RUSSIAN FEDERATION phone: +78793382382 phone: +78793467937 fax-no: +78793422985 e-mail: email@example.com admin-c: DES2016-RIPE admin-c: POST1-RIPE admin-c: SAB5-RIPE admin-c: SS2324-RIPE abuse-c: POST1-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: POSTLTD-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: POSTLTD-MNT created: 2004-04-17T11,56,42Z last-modified: 2016-05-18T11,25,10Z source: RIPE role: System Administrator Role-Account address: 118a, Pyatigorskaya st., apt. 117 address: 357600, Essentuky, Russia phone: +78793467937 fax-no: +78793422985 e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com org: ORG-Ol3-RIPE admin-c: BLNY-RIPE admin-c: TRV6-RIPE tech-c: BLNY-RIPE tech-c: TRV6-RIPE nic-hdl: POST1-RIPE mnt-by: POSTLTD-MNT created: 2002-10-30T17,02,51Z last-modified: 2013-09-09T07,58,09Z source: RIPE route6: 2a00,1e10,,/32 descr: JSC Post Ltd Network origin: AS12494 mnt-by: POSTLTD-MNT created: 2012-10-22T11,45,07Z last-modified: 2012-10-22T11,45,07Z source: RIPE
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.